/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.dao.upgrade;

import org.apache.dolphinscheduler.common.utils.ConnectionUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

public class WorkerGroupDao {

  public static final Logger logger = LoggerFactory.getLogger(WorkerGroupDao.class);

  /**
   * query all old worker group
   *
   * @param conn jdbc connection
   * @return old worker group Map
   */
  public Map<Integer, String> queryAllOldWorkerGroup(Connection conn) {
    Map<Integer, String> workerGroupMap = new HashMap<>();

    String sql = String.format("select id,name from t_ds_worker_group");
    ResultSet rs = null;
    PreparedStatement pstmt = null;
    try {
      pstmt = conn.prepareStatement(sql);
      rs = pstmt.executeQuery();

      while (rs.next()) {
        int id = rs.getInt(1);
        String name = rs.getString(2);
        workerGroupMap.put(id, name);
      }

    } catch (Exception e) {
      logger.error(e.getMessage(), e);
      throw new RuntimeException("sql: " + sql, e);
    } finally {
      ConnectionUtils.releaseResource(rs, pstmt, conn);
    }

    return workerGroupMap;
  }
}
